My dad told me about that one, too. The Treasury people were going nuts -- they were responsible for the President's security.
The story,as well as the front page photo from the Washington Post are on the internet. Eleanor had a communist boyfriend named "Joe" something that was most likely her "handler". At any rate,Hoover kept him under survelience,and even taped Joe and Eleanor bumpin' ugly in several hotel rooms. I had links to all this stuff bookmarked,but a virus got them.